Connection for connecting rods of reciprocatory engines acting on a common crank



Oct. 9 1923.

1,469,827 G. SILVESTRI CONNECTION FOR CONNECTING RODS OF RECIPROGATORY ENGINES ACTING ON A COMMON CRANK Filed Jan. 12. 1921 i Patented Got. 9, 1923.

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eIULIo SILVESTRI, ornomum, NEAR VIE NA; nus'rnrni CONNECTION FOR oomvno'rrne Eons or nnorrnoonronY nnemns AoTIiveoN a; cont} MON CRAN Application filed January 12, 1921 Serial No. 426,792. 7

. To all whom it may concern:

Be it known that I, GIULIo Srnvnsrrnr', a subject of I\ustria,residing at Rodaun, near Vienna, in Austria, have invented a new and useful Improvement in Connections'for Connecting Rods of Reciprocatory En 'nes Acting on a Common Crank (for which I have filed applications in Spain Mar.,20,

' 1920, Patent No. 78,027; in Switzerland 10 June 21, 1920, Patent No. 92,770; in Italy June 21, 1920, Patent No. 186,601;in France July 1, 1920, PatentNo. 518,525; in Belgium July 8, 1920, 'Patent No. 288,421; in

v ;.Austria Sept. 30,1914, Patent No. 73,755, in Sweden Nov. 13, 1916, Patent No.46,230;

in Norway Aug. 10,1917, Patent No. 31,- 313; in Denmark Aug. 10, 1917, Patent No. 26,013; in Czechoslovakia Apr. 20, 1920, No.

2992/1920; in Poland May 4, 1920, N0. 7 6409/1920; in Hungary July 8, .1920, No.

, 9163; and in Germany Oct. 2, 1915, No. 636,866), of which the following is a specification. I

The subject rocating' engines acting on a common crank in which, as compared wlth-the usual known forms ofconnection,-, a greater are of the crank pin is embraced by the end bearing member and a better distribution of pressure is attained.

Connections of this kind, in which the turn the bearing member transversely of the crank axis, becomes quickly Worn and the rigidity and tight fit of the connection is destroyed. r V V In accordance with the present-invention for the production of ,a suitable easily manuthe boundary of which comprises helices ex tending in opposite directions from the mid point of the generatrlx or else presents a bearing surface consisting of halves-arranged at an angle to one another in the manner of double helical toothing; the bearing member being covered by a transverse member to-the centre of which the connecting rod is secured, orthe coverlng being her.

1 of the present inventionis a 25 connection for the connecting rods'of recipference ofthe pin is embraced;

factured form of connection the big end bearing member is formed of a single piece omitted and the connecting rod' engagedf with its forked end at -the centres of gravity of the halves. y ,7 "Two embodiments of the invention are shown in the drawings in which Fig. 11

shows the first mentioned embodiment in whic'h the boundary of the bearing aide-- viates in circumferential directions from the generatrix at thelongitudinal'centre d of the crank pin 0 so that a greater-arc of' the circumference of thepin e is "embraced; The connecting rod engages with its forked ends at holes 72 preferably at'the'cen V t re of gravity of the respective halves.

In the construction shown in Fig. 2, the connecting rod 9 is not forked but engages a member f which is connected with the-connecting rodg' and overliesthe bearing menu I If, as shown, .the bearing surfaces extend from. points at both ends of the pin lying in a like generatrix in the form ofoppositely wound helices. d "of likezinclination which meet in the middle of the pin '0 there :is so formed a bearing member havingran edge similar "to double helijcaltoothing which is easily produced in the" workshop. I claim 1. A- connecting rod for reciprocating en-f. gines having several cylinders the pistons of which act upon a common cranlgi'n which the surface of the head ofthe'connecting rod bearing directly: against the crank pin is shaped asaring segment and is bounded on each side in the circumferential? direction by a line which extends-from points at. both ends'of'the head lying in a like generatrix of the cylindrical bearing surface and (le viates incircumferential direction from said generatrixi'n the middle of the: head or as crank pin so 'thatagreater arc of the circum I 7 2. A connecting'rod'forfreclprocating enj gines having several cylinders the pistons of which: act upon a common crank, I in crank pin'is shaped as a ring segment and another.

V a whichgthe surface of the head of fithecon i 1 1- necting rodibearing directly; aga nstjjthe j I mmo YSILVESTRI; i 0 1 

